Bathtub



FIG. 1 is a top front perspective view of a bathtub, showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a right end view thereof; and,

FIG. 7 is a left end view thereof.

The bottom view being plain and unornamented. 

The ornamental design for a bathtub, as shown and described. 